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Original Research Papers

Vertical fluxes and micrometeorology during aerosol particle formation events

Authors:

G. Buzorius,

Department of Physics, FI
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Ü. Rannik,

Department of Physics, FI
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D. Nilsson,

Department of Meteorology, Stockholm University, SE
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M. Kulmala

Department of Physics, FI
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Abstract

Fluxes of aerosol particles with sizes larger than 10 nm together with fluxes of momentum, sensible and latent heat and CO2 were measured 10 m above a Scots pine forest with the eddy covariance method. During days when nucleation events were observed particle size distribution measurements showed particle growth from 3 nm sizes to the Aitken mode. Analysis of the experimental data showed systematic differences in fluxes during the days when new particle production was observed compared to other days. During the nucleation events the particle flux measurements showed downward aerosol particle transport, i.e., indicating an elevated source, with respect to the measurement level, of particles larger than 10 nm. Furthermore the turbulence intensity and the heat fluxes were observed to be significantly higher. Evidences of mesoscale circulation were observed in wind speed records as well as in turbulent fluxes on nucleation days. The measurement results show that micrometeorology, the synoptic scale conditions and the particle formation are closely related.

How to Cite: Buzorius, G., Rannik, Ü., Nilsson, D. and Kulmala, M., 2001. Vertical fluxes and micrometeorology during aerosol particle formation events. Tellus B: Chemical and Physical Meteorology, 53(4), pp.394–405. DOI: http://doi.org/10.3402/tellusb.v53i4.16612
  Published on 01 Jan 2001
 Accepted on 19 Jan 2001            Submitted on 4 May 2000

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